The invention discloses a Tieguanyin tea beverage in the field of tea beverages. The Tieguanyin tea beverage is prepared from raw materials in parts by mass as follows: 7-8 parts of Tieguanyin, 12-15 parts of fresh milk, 110-120 parts of water, 0.05-0.1 parts of a yoghurt starter, 1-2 parts of xylitol and 0.5-0.8 parts of probiotics. A preparation method of the Tieguanyin tea beverage comprises steps as follows: step 1, tea soup is prepared; step 2, Tieguanyin steam is prepared; step 3, the fresh milk is injected into a fermentation barrel, the Tieguanyin steam in the step 2 penetrates the bottom of the fermentation barrel to be in contact with the fresh milk, and the yogurt starter is added and makes full contact with the fresh milk, the probiotics are added, the fermentation barrel is heated, the temperature in the fermentation barrel is maintained at 45-50 DEG C for 115-118 min, and a semi-finished product of the Tieguanyin tea beverage is obtained; step 4, the xylitol is added when the semi-finished product of the Tieguanyin tea beverage in the step 3 is kept at the temperature of 39-40 DEG C, the product is then cooled to the room temperature, and a finished product of the Tieguanyin tea beverage is obtained. The invention aims to prepare the Tieguanyin tea beverage keeping effects of Tieguanyin.